Stamp



FIG. 1 is a perspective view of the stamp showing our new design;

FIG. 2 is a side view thereof;

FIG. 3 is a side view thereof shown on an enlarged scale and rotated 90degrees;

FIG. 4 is top view of the stamp shown in FIG. 3; and,

FIG. 5 is a bottom view of the stamp shown in FIG. 3.

The ornamental design for a stamp, as shown and described. 